The Hollywood stars were pictured kissing and dancing together as they were shot on top of a balcony of a restaurant decorated with flowers and fairy lights and filled with elegantly dressed extras as guests.

Miller was sporting brunette hair, a traditional-looking white wedding dress and a veil, while a heavier-set Cooper revealed cropped hair and donned a smart suit.

The 39-year-old actor has reportedly gained 40lbs to play the role of former Navy SEAL chief Chris Kyle in the Eastwood-directed drama. The film is based on the autobiography of Kyle, who has the greatest number of sniper kills in US military history.

Miller plays Kyle's wife Taya Renae, who is left to manage their family's home life while her husband is abroad. The 32-year-old actress, who is engaged to British actor Tom Sturridge, was also spotted wearing a baby bump and breaking down on the phone while being directed by Eastwood in a more dramatic scene.